Isaia Cristina, McMaster Simon A, McNally Donal
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:4555-4558. doi: 10.1109/EMBC44109.2020.9176429.
Textile-based strain sensors combine wearability with strain sensing functionality by using only the tensile and electrical properties of the threads they are made of. In this study, two conductive sleeves were manufactured for the elbow and three for the knee using a Santoni circular machine with different combinations of elastomeric and non-elastomeric yarns. Linearity, repeatability and sensitivity of the sleeves resistance with strain were compared during 5 repetitive trials, each of them consisting of 4 sequences of 50 joint flexion-extension cycles. All knitted conductive sleeves registered motion over 1000 cycles, proving their suitability for joint motion tracking. In addition, sleeves whose inner layer was made only with nylon exhibited the highest sensitivity and predictability of changes (i.e. a linear trend of the non-elastic deformation). On the other hand, sleeves whose inner layer was made with lycra and polyester or lycra and nylon showed a more balanced performance in terms of linearity, sensitivity and repeatability either for low or high number of cycles. Based on requirements, knitted conductive sleeves show a potential for application in rehabilitation both in healthcare and sports.
基于纺织品的应变传感器通过仅利用其所用纱线的拉伸和电学特性，将可穿戴性与应变传感功能结合起来。在本研究中，使用桑托尼圆型针织机，采用弹性和非弹性纱线的不同组合，为肘部制作了两个导电袖套，为膝盖制作了三个导电袖套。在5次重复试验中，比较了袖套电阻随应变的线性度、重复性和灵敏度，每次试验由4组每组50次关节屈伸循环组成。所有针织导电袖套记录的运动超过1000个循环，证明它们适用于关节运动跟踪。此外，内层仅由尼龙制成的袖套表现出最高的灵敏度和变化可预测性（即非弹性变形的线性趋势）。另一方面，内层由莱卡和聚酯或莱卡和尼龙制成的袖套，在低循环次数或高循环次数下，在线性度、灵敏度和重复性方面表现出更平衡的性能。根据需求，针织导电袖套在医疗保健和体育康复应用中显示出潜力。
